I used *flume-ng 1.5* version to collect logs.
There are two agents in the data flow and they are on two hosts,
respectively.
And the data is sended *from agent1 to agent2.*
The agents's component is as follows:
agent1: spooling dir source --> file channel --> avro sink
agent2: avro source --> file channel --> hdfs sink
But it seems to loss data about 1/1000 percentage of million data.To solve
problem I tried these steps:
1. look up agents log: cannot find any error or exception.
2. look up agents monitor metrics: the events number that put and take
from channel always equals
3. statistic the data number by hive query and hdfs file use shell,
respectively: the two number is equal and less than the online data number
These are the two agents configuration:
#agent1
agent1.sources = src_spooldir
agent1.channels = chan_file
agent1.sinks = sink_avro
#source
agent1.sources.src_spooldir.type = spooldir
agent1.sources.src_spooldir.spoolDir = /data/logs/flume-spooldir
agent1.sources.src_spooldir.interceptors=i1
#interceptors
agent1.sources.src_spooldir.interceptors.i1.type=regex_extractor
agent1.sources.src_spooldir.interceptors.i1.regex=(\\d{4}-\\d{2}-\\d{2}).*
agent1.sources.src_spooldir.interceptors.i1.serializers=s1
agent1.sources.src_spooldir.interceptors.i1.serializers.s1.name=dt
#sink
agent1.sinks.sink_avro.type = avro
agent1.sinks.sink_avro.hostname = 10.235.2.212
agent1.sinks.sink_avro.port = 9910
#channel
agent1.channels.chan_file.type = file
agent1.channels.chan_file.checkpointDir = /data/flume/agent1/checkpoint
agent1.channels.chan_file.dataDirs = /data/flume/agent1/data
agent1.sources.src_spooldir.channels = chan_file
agent1.sinks.sink_avro.channel = chan_file
# agent2
agent2.sources = source1
agent2.channels = channel1
agent2.sinks = sink1
# source
agent2.sources.source1.type = avro
agent2.sources.source1.bind = 10.235.2.212
agent2.sources.source1.port = 9910
# sink
agent2.sinks.sink1.type= hdfs
agent2.sinks.sink1.hdfs.fileType = DataStream
agent2.sinks.sink1.hdfs.filePrefix = log
agent2.sinks.sink1.hdfs.path = hdfs://hnd.hadoop.jsh:8020/data/%{dt}
agent2.sinks.sink1.hdfs.rollInterval = 600
agent2.sinks.sink1.hdfs.rollSize = 0
agent2.sinks.sink1.hdfs.rollCount = 0
agent2.sinks.sink1.hdfs.idleTimeout = 300
agent2.sinks.sink1.hdfs.round = true
agent2.sinks.sink1.hdfs.roundValue = 10
agent2.sinks.sink1.hdfs.roundUnit = minute
# channel
agent2.channels.channel1.type = file
agent2.channels.channel1.checkpointDir = /data/flume/agent2/checkpoint
agent2.channels.channel1.dataDirs = /data/flume/agent2/data
agent2.sinks.sink1.channel = channel1
agent2.sources.source1.channels = channel1
Any suggestions are welcome!
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